soc/intel: Guard remaining SA_DEV_ROOT definition

Prevent implicit cast to pointers.

The compiler doesn't warn about the conversion from
integer to pointer without a cast, because SA_DEV_ROOT
is literally '0' and there seems to be an exception
for that conversion.

Change-Id: I64fc156e3b9f578414ad03a00edb7cf3e33205c1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34544
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/apollolake/include/soc/pci_devs.h

@@ -30,7 +30,9 @@
 
 #define SA_DEV_SLOT_ROOT	0x00
 #define  SA_DEVFN_ROOT		PCI_DEVFN(SA_DEV_SLOT_ROOT, 0)
+#if defined(__SIMPLE_DEVICE__)
 #define  SA_DEV_ROOT		PCI_DEV(0, SA_DEV_SLOT_ROOT, 0)
+#endif
 
 #define SA_DEV_SLOT_PUNIT	0x01
 #define  SA_DEVFN_PUNIT		PCI_DEVFN(SA_DEV_SLOT_PUNIT, 0)